Arrggghh,
Checkout the new iPhone...out tomorrow
http://tinyurl.com/2y7zwe
Wonder what display that is...probably OLED
but...with a touchscreen !
WatchJohn
.
OK no problemo...thanks !
One thing with OLED´s is that it takes a second
to switch them on...meaning...if it´s off because
you want to save power...it will take a second
to get a picture,so you could miss some information,
that could be overcome by storing/buffering whatever info
there was...
.
Hi itsmoked,
> "a second to update"
I dont know about that
...how can they play smooth video then?
...that is at least between 10 to 30 frames per second !!
Maybe you have seen a demo where someone tried to show
a 3D model that was moving...and it maybe was slow
because the model was...
.
Thanks,
The displays in the Digikey catalog are either to big
or they are not alphanumeric...also i have a problem understanding exactly what the sizes of the modules are
as far as i can see now...nothing for me unless i´m overlooking something.
The displays from that German company...
.
Thanks Keith,
Checked out both companies...they have NO off-the-shelf
4 digit, alphanumeric or dotmatrix display
...that comes close to mentioned small size
...maybe i have overlooked it ?
LED would be fine... i wouldn´t care..they could be
better readable in the light)no backlight needed)...
.
Hi,
For my wristwatch sized bugdetector
i need a very small display(module)...it should be:
a) Small as possible something like 20 mm x 10 mm x 3 mm
b) 4 characters (alphanumeric or even better dotmatrix)
c) Low voltage 5 V or better less
d) Low power draw 100mA or better much less...
DTMF "Dual Tone Multi Frequency" can also be used to
transmit (very slow) data.
DTMF transmitter and receiver chips are available
for less then 1 U$
They will give you at least 10 codes that can be transmitted
over great lengths as simple audio.
Transceivers (RX and TX in 1 chip) are also...
I can´t remember the exact name
but their seems to be a technique where the power
drawn by an electrical motor is observed..it seems
that pulses can be observed on the power line
those pulses represent the motor-speed and are in turn
used to control the engine speed
...so it´s some kind of...
.
Shure it seems easy to find cams that
produce non-standard formats.
But at the moment these are not offered
at the regular outlets for video-spy-equipment.
i´ve seen thousands of such websites and they
don´t have them...for various reasons:
1) To expensive.
2) No pinhole/covert lens...
.
Yes...in case of non-analog or non-NTSC or non-PAL
or non SECAM ...etc it won´t work.
But....
Check out the 1000 spyshops on the net
and show me 1 miniature/pinhole camera
with a real digital ouput (non NTSC or PAL)
So in 99.99999% a analog camera is going to
be used..when we are...
.
Hi Dan,
That was a very fast answer ! (4 minutes)
Why don´t you give it a try ?
Take your shortwave-receiver
or connect a line to your soundcard and download
some spectrum analyzing software.
Start with a few turns around the video-cable
...close to the camera.
The point is that:
CMOS...
.
I need a antenna for a Video-Camera-Detector
...this is not just for wireless cams
but for all cams...specially the !! WIRED !!
The detector is in fact a receiver for the
horizontal-sync frequency used by all
video-cameras and other video-equipment
For NTSC that is 15734 HZ (15,7 khz)...
.
It depends on your DF-equipment
usually they come with (4)antennas included
and instructions on how to adjust them to freq.
For 80 Mhz best results would give
1/4 wave whips...so they would be around 1 meter each.
Best to space antennas at minimal 1/2 wavelength
...wich is 2 meters....less...
.
IRstuff said:
> "High end bugs don't continuously broadcast,
> "specifically to avoid detection by standard
> "RF detection methods.
Yep...those are called "Burst-transmitters"
Just as with digital or encrypted bugs...these
are not common available or in use by the greater
public...
.
Hello again,
> "The world's first 10 kg (22 lb) 'wristwatch"
Believe it or not...but i have most of the device
already designed..and it is indeed the size of
a wristwatch...not even that redicioulous big
currently i think it will be 40mm Diameter x 18 mm High
Fortunately i realised that...
.
Hi VE1BLL,
It´s really another story and needs a thread on its own.
But a short answer to your comment:
I can´t have 1 single small antenna for 1 Mhz to 10 Ghz
so i devide that range into 4 practical pieces
for each i can make an antenna that will cover such piece.
bands are devide...
.
Ok...i understand all arguments...thanks !
digital-pots seem to be the best solution
But let me explain a little more:
---------------------------------
Indeed it is for my "Wristwatch-Sized-Bugdetector"
That thing is going to have a very wide frequency-range
from at least 1 Mhz to 10...
.
Thanks Keith,
I understand your suggestions
and i´m shure it will work.
...but i am looking for a solution
where i would only have to use one single digital pot
I see you perfectly understand what i want to do.
For others i just thought of another way to better
explain what i am looking...
.
Hi,
It`s a little difficult to explain:
I have 4 audiochannels (mono)
I have 1 amplifier to make them audible
I want to use only 1 potmeter to mix/pan them
to the amplifier.
Lets say these are the 4 channels
1...2...3...4
Ideally i like to be able to "pan" over the channels
to hear...
.
Sounds like you have 2 W-lan cards connected to a PC
and they have 2 external antennas.
"How far apart"...you ask
To achieve what ?
a)
To not interfere ?...meaning 1 TX troubeling the other RX ?
...theoretically as much as possible distance.
...in practice as long as the cables allow...
